Title:
DIAGNOSTIC DEVICE, EQUIPMENT COMPRISING SAME, AND DIAGNOSTIC METHOD
Document Type and Number:
WIPO Patent Application WO/2020/157818
Kind Code:
A1
Abstract:
This diagnostic device for diagnosing a piece of machinery that includes a driving part and a driven part rotationally driven by the driving part comprises: a plurality of acoustic sensors that are provided to different locations and that are for detecting sounds generated by the machinery; a sound data acquisition unit that is configured so as to acquire a plurality of sound data sets including the sounds detected by each of the plurality of acoustic sensors during each of a plurality of rotational speed conditions differing in the rotational speed of the driving part; a frequency analysis unit that is configured so as to analyze the frequencies of the plurality of sound data sets respectively acquired for the plurality of rotational speed conditions; a peak frequency identification unit that identifies, on the basis of the frequency analysis results from the frequency analysis unit, one or more rotational speed conditions in which the plurality of sound data sets share a peak frequency, and said peak frequency; and a sound source information acquisition unit that, for each of the one or more rotational speed conditions, obtains information related to a sound generation source, within the machinery, having a natural frequency corresponding to the peak frequency, the information being obtained on the basis of the installed location, relative to the machinery, of the one acoustic sensor having the largest amplitude in the sound data corresponding to the peak frequency, among the plurality of acoustic sensors.
Inventors:
MATSUI YOICHI (JP)
ODAWARA YUTA (JP)
ODAWARA YUTA (JP)
Application Number:
PCT/JP2019/002883
Publication Date:
August 06, 2020
Filing Date:
January 29, 2019
Export Citation:
Assignee:
PRIMETALS TECH JAPAN LTD (JP)
International Classes:
B21B38/00; G01H17/00; B21C51/00
Foreign References:
| JPH10288547A | 1998-10-27 | |||
| JPH1183618A | 1999-03-26 | |||
| JPH04283645A | 1992-10-08 | |||
| JP2005337846A | 2005-12-08 |
Attorney, Agent or Firm:
SEISHIN IP PATENT FIRM, P.C. (JP)
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